Coates told The Sentinel: "It's not the scoreline we would have wanted, but it is still a great night for Ryan and his family. He must be a proud young man and we are delighted for him.
"Okay, the goals came as they did, but football is an unpredictable game.
"Ibrahimovic is a fantastic player. It's difficult to come on and you need that bit of luck. These things happen.
"We know Ryan is a good player, and you can't judge him on 20 minutes."